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• Obregonia
• Ochagavia
• Ochna
• Ocimum
• Odontioda
• Odontocidium
• Odontoglossum
• Odontonema
• Odontonia
• Oemleria
• Oenanthe
• Oenothera
• Olea - Olive
• Olearia
• Olneya
• Olsynium
• Omphalodes
• Omphalogramma
• Oncidium
• Onoclea
• Ononis
• Onopordum
• Onosma
• Oophytum
• Ophiopogon
• Ophrys
• Ophthalmophyllum
• Oplismenus
• Opuntia
• Orbea
• Orbeopsis
• Orchis
• Oreocereus
• Origanum
• Orixa
• Ornithogalum
• Ornithophora
• Orontium
• Orostachys
• Oroya
• Ortegocactus
• Orthophytum
• Orthrosanthus
• Orychophragmus
• Oryza
• Osbeckia
• Osmanthus
• Osmarea
• Osmaronia
• Osmunda
• Osteomeles
• Osteospermum
• Ostrowskia
• Ostrya
• Othonna
• Ourisia
• Oxalis
• Oxydendrum
• Ozothamnus

Malvaviscus

Malvaviscus is a genus of shrubs in the mallow family Malvaceae, native to tropical America from Florida, Texas and Mexico south to Peru and Brazil. The flowers resemble those of the related genus Hibiscus, except that the petals are folded... more >>>

Begonia

Begonia is a genus in the flowering plant family Begoniaceae. The only other member of the family Begoniaceae is Hillebrandia, a genus with a single species in the Hawaiian Islands. The genus Symbegonia is now included in Begonia.... more >>>

Xylosma

Xylosma is a genus of between 85-100 species of evergreen shrubs and trees in the family Salicaceae.

The genus is predominantly native to the tropics, from the Caribbean, Central America, northern South America, the Pacific... more >>>

Ulex - Gorse

Gorse (Ulex) comprises a genus of about 20 species of evergreen shrubs in the subfamily Faboideae of the pea family Fabaceae, native to western Europe and northwest Africa, with the majority of species in Iberia. Other common names for gorse... more >>>

Fitzroya

Fitzroya is a genus in the cypress family Cupressaceae with a single species, Fitzroya cupressoides native to the Andes mountains of southern Chile and adjoining Argentina, where it is an important member of the Valdivian temperate rain... more >>>